playa-ffmpeg 8.0.3

Safe FFmpeg wrapper with vcpkg integration for simplified cross-platform builds (FFmpeg 8.0, Rust 2024)
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110

use std::{marker::PhantomData, slice};

use crate::ffi::*;
use libc::{c_double, c_int};

pub struct Vector<'a> {
    ptr: *mut SwsVector,

    _own: bool,
    _marker: PhantomData<&'a ()>,
}

impl<'a> Vector<'a> {
    pub unsafe fn wrap(ptr: *mut SwsVector) -> Self {
        Vector { ptr, _own: false, _marker: PhantomData }
    }

    pub unsafe fn as_ptr(&self) -> *const SwsVector {
        self.ptr as *const _
    }

    pub unsafe fn as_mut_ptr(&mut self) -> *mut SwsVector {
        self.ptr
    }
}

impl<'a> Vector<'a> {
    pub fn new(length: usize) -> Self {
        unsafe { Vector { ptr: sws_allocVec(length as c_int), _own: true, _marker: PhantomData } }
    }

    pub fn gaussian(variance: f64, quality: f64) -> Self {
        unsafe { Vector { ptr: sws_getGaussianVec(variance as c_double, quality as c_double), _own: true, _marker: PhantomData } }
    }

    #[cfg(not(feature = "ffmpeg_5_0"))]
    pub fn value(value: f64, length: usize) -> Self {
        unsafe { Vector { ptr: sws_getConstVec(value as c_double, length as c_int), _own: true, _marker: PhantomData } }
    }

    #[cfg(not(feature = "ffmpeg_5_0"))]
    pub fn identity() -> Self {
        unsafe { Vector { ptr: sws_getIdentityVec(), _own: true, _marker: PhantomData } }
    }

    pub fn scale(&mut self, scalar: f64) {
        unsafe {
            sws_scaleVec(self.as_mut_ptr(), scalar as c_double);
        }
    }

    pub fn normalize(&mut self, height: f64) {
        unsafe {
            sws_normalizeVec(self.as_mut_ptr(), height as c_double);
        }
    }

    #[cfg(not(feature = "ffmpeg_5_0"))]
    pub fn conv(&mut self, other: &Vector) {
        unsafe {
            sws_convVec(self.as_mut_ptr(), other.as_ptr() as *mut _);
        }
    }

    #[cfg(not(feature = "ffmpeg_5_0"))]
    pub fn add(&mut self, other: &Vector) {
        unsafe {
            sws_addVec(self.as_mut_ptr(), other.as_ptr() as *mut _);
        }
    }

    #[cfg(not(feature = "ffmpeg_5_0"))]
    pub fn sub(&mut self, other: &Vector) {
        unsafe {
            sws_subVec(self.as_mut_ptr(), other.as_ptr() as *mut _);
        }
    }

    #[cfg(not(feature = "ffmpeg_5_0"))]
    pub fn shift(&mut self, value: usize) {
        unsafe {
            sws_shiftVec(self.as_mut_ptr(), value as c_int);
        }
    }

    pub fn coefficients(&self) -> &[f64] {
        unsafe { slice::from_raw_parts((*self.as_ptr()).coeff, (*self.as_ptr()).length as usize) }
    }

    pub fn coefficients_mut(&self) -> &[f64] {
        unsafe { slice::from_raw_parts_mut((*self.as_ptr()).coeff, (*self.as_ptr()).length as usize) }
    }
}

#[cfg(not(feature = "ffmpeg_5_0"))]
impl<'a> Clone for Vector<'a> {
    fn clone(&self) -> Self {
        unsafe { Vector { ptr: sws_cloneVec(self.as_ptr() as *mut _), _own: true, _marker: PhantomData } }
    }
}

impl<'a> Drop for Vector<'a> {
    fn drop(&mut self) {
        unsafe {
            if self._own {
                sws_freeVec(self.as_mut_ptr());
            }
        }
    }
}